EP 0752771 B1 20050824 - Method for processing a digital signal such that the output digital signal can not be derived from the input signal, and use of the method for access control and/or digital signatures
Title (en)
Method for processing a digital signal such that the output digital signal can not be derived from the input signal, and use of the method for access control and/or digital signatures
Title (de)
Verfahren zur Verarbeitung eines digitalen Signals in solcher Weise, dass das Ausgangs- nicht vom Eingangssignal abgeleitet werden kann, und Verwendung des Verfahrens zur Zugriffssteuerung und/oder digitaler Unterschrift
Title (fr)
Procédé de traitement d'un signal numérique tel que le signal numérique en sortie ne peut se déduire du signal numérique en entrée, et utilisation de ce procédé pour le contrôle d'accès et/ou la signature binaire
Publication
Application
Priority
FR 9508004 A 19950703
Abstract (en)
[origin: EP0752771A1] The method involves use of a scrambling circuit (1) which receives a digital input signal (x) of dimensionality, k, and sends a signal to a formatting circuit (2) to give a digital signal (x") of dimensionality, n, acceptable to the function. The formatting circuit can be a permutation generation circuit applied to a secret key signal (S) of dimension, n, and Hamming weighting, d, lexicographical sort. Alternatively the secret key may act on a pseudo-random generator with a digital input and an output which is a signal of n dimensions with heavy Hamming weighting, d. The output (y) is obtained using a function obtained by multiplying a binary digital signal by an m x n binary matrix where n is the number of columns.
IPC 1-7
IPC 8 full level
H04L 9/20 (2006.01); G09C 1/00 (2006.01); H04L 9/08 (2006.01)
CPC (source: EP KR US)
H04K 1/00 (2013.01 - KR); H04L 9/0643 (2013.01 - EP US); H04L 9/0662 (2013.01 - EP US); H04L 2209/34 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0752771 A1 19970108; EP 0752771 B1 20050824; BR 9602952 A 19980422; CN 1142716 A 19970212; CN 1150713 C 20040519; DE 69635100 D1 20050929; DE 69635100 T2 20060518; FR 2736485 A1 19970110; FR 2736485 B1 19970814; JP H09146456 A 19970606; KR 100519379 B1 20051129; KR 970009020 A 19970224; MX 9602275 A 19970131; MY 132297 A 20071031; US 5764771 A 19980609
DOCDB simple family (application)
EP 96401336 A 19960619; BR 9602952 A 19960702; CN 96110239 A 19960628; DE 69635100 T 19960619; FR 9508004 A 19950703; JP 17147196 A 19960701; KR 19960026793 A 19960703; MX 9602275 A 19960611; MY PI19962705 A 19960701; US 66262596 A 19960613